I suspect that this will not be addressed because it seems to be a problem with really old nodes (I'm guessing bugs in old node builders) but it didn't happen in old ZDoom, though it seems to have bee around for some time in GZDoom. Anyway, it's always worth reporting something just in case.
I've been on an old map binge recently and several maps from idgames that I have played have shown a problem where sprites simply disappear in certain areas of maps. The issue is easily reproducible and I think it happens in all GZDoom renderers - but it does not happen in the last version of ZDoom. It goes back quite a long way in GZDoom though. I have an old copy of g3.3pre39 installed and it seems to happen there.
I did take one of the maps, opened it in GZDB and re-saved it. This cured the problem for that map. Forcing GZDoom to build nodes fixes it too. So it does seem to be an old nodes problem.
Attached is a map from my own really old 94/95-ish NJDoom. It runs on E3M5.
Load up Doom with the map on HMP difficulty and type the following at the console.
map e3m5
warp 420 3128
god
Turn 90 degrees to the left and watch the Baron as he approaches you. If he shoots, his plasma will become invisible before it reaches you and when he walks towards you, he too will become invisible. The actors are still there though and will damage you if not in good mode. If dynamic lights are active, the light does not vanish, only the sprite.
Dynamic light from invisible plasma thrown at me by an invisible Baron:
I suspect that this will not be addressed because it seems to be a problem with really old nodes (I'm guessing bugs in old node builders) but it didn't happen in old ZDoom, though it seems to have bee around for some time in GZDoom. Anyway, it's always worth reporting something just in case.
I've been on an old map binge recently and several maps from idgames that I have played have shown a problem where sprites simply disappear in certain areas of maps. The issue is easily reproducible and I think it happens in all GZDoom renderers - but it does not happen in the last version of ZDoom. It goes back quite a long way in GZDoom though. I have an old copy of g3.3pre39 installed and it seems to happen there.
I did take one of the maps, opened it in GZDB and re-saved it. This cured the problem for that map. Forcing GZDoom to build nodes fixes it too. So it does seem to be an old nodes problem.
Attached is a map from my own really old 94/95-ish NJDoom. It runs on E3M5.
Load up Doom with the map on HMP difficulty and type the following at the console.
map e3m5
warp 420 3128
god
Turn 90 degrees to the left and watch the Baron as he approaches you. If he shoots, his plasma will become invisible before it reaches you and when he walks towards you, he too will become invisible. The actors are still there though and will damage you if not in good mode. If dynamic lights are active, the light does not vanish, only the sprite.
Dynamic light from invisible plasma thrown at me by an invisible Baron:
[imgur]https://imgur.com/twuolXN[/imgur]